Workers at left stand is done on the Integrated Truss Structure ITS Z1 at right.

Workers at left stand by while work is done on the Integrated Truss Structure (ITS) Z1 at right. To the left of the Z1 is a high-gain antenna that will be installed on the Z1. An early exterior framework for the International Space Station, the Z1 will allow the first U.S. solar arrays, on mission STS-97, flight 4A, to be temporarily installed on Unity for early power. The Z1 is a payload scheduled on mission STS-92, the fifth flight to the Space Station, in the fall